One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,8,9)(7,10,11,12)(13,14,17,18)(15,16,20,19)(21,22,26,27)(23,28,29,24)(25,30,34,35)(31,36,33,32)(7,11)(10,12)(13,15)(14,16)(17,20)(18,19)(22,27)(24,28)(30,35)(32,36) involution — undirected(6,9)(10,12)(14,18)(15,20)(21,23)(22,28)(24,27)(25,33)(26,29)(30,32)(31,34)(35,36) involution — undirected(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,15)(14,19)(16,18)(17,20)(21,24,26,28)(22,29,27,23)(25,32,34,36)(30,33,35,31)(5,7,8,11)(6,10,9,12)(13,16,17,19)(14,15,18,20)(21,25)(22,30)(23,31)(24,32)(26,34)(27,35)(28,36)(29,33)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.